CVE-2026-57951: Mythic < 3.4.0.60 - Broken Permission Filter in payload_build_step Table

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-29 · updated 2026-10-25
Weakness: CWE-863

Description

Mythic before 3.4.0.60 contains a broken hasura permission filter on the payload_build_step table with an always-satisfied _or condition that bypasses operation-scoped access controls. Authenticated operators and spectators can query payload_build_step to read step_stdout, step_stderr, step_name, and step_description across all operations on the server.

Affected products

its-a-feature Mythic: before 3.4.0.60 — fixed in 3.4.0.60

How to fix

Upgrade to a fixed version: its-a-feature Mythic 3.4.0.60. Check the vendor advisory for mitigations.

References

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